Combine the jalapeno dip and 8 ounces sour cream in a small mixing bowl. Spread this mixture over the cheesecake to cover any cracks. Return to cake the oven and bake 10 minutes.

Remove the cake from the oven and let it cool for at least 4 hours. When cooled, dollop remaining sour cream on top of the cake (in the center). Arrange the tomatoes, black olives, and green onions around the sour cream in concentric circles.